1 definition by EvolNation

Top Definition
A sexual party with two or more women and one or more men. The females perform oral sex on the male(s). The colors of the lipsticks are left on the male's penis after oral sex--making the penis resemble a rainbow when many women have perormed oral sex on him.
"Lisa was the best at the rainbow party--crimson always beats red and blue!"
by EvolNation December 03, 2005

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